CN113330239B

CN113330239B - Venting member

Info

Publication number: CN113330239B
Application number: CN202080010384.9A
Authority: CN
Inventors: 仲山雄介; 矢野阳三; 笠置智之; 宫垣晶
Original assignee: Nitto Denko Corp
Current assignee: Nitto Denko Corp
Priority date: 2019-01-29
Filing date: 2020-01-24
Publication date: 2023-09-05
Anticipated expiration: 2040-01-24
Also published as: US11739853B2; KR20240056608A; JPWO2020158612A1; WO2020158612A1; JP7399893B2; KR20210118158A; US20220120354A1; DE112020000576T5; CN113330239A

Abstract

The ventilation member (1 a) is provided with a valve core (10), a shaft (20), a ventilation passage (15), and a ventilation membrane (30). The valve core (10) is formed in an umbrella cloth shape. The shaft portion (20) extends in the normal direction of the valve core portion (10). The shaft portion (20) supports the valve core (10). The ventilation passage (15) penetrates the shaft (20) in the normal direction of the valve body (10). The ventilation membrane (30) blocks the ventilation channel (15) so as to be capable of ventilation. In a state where the ventilation member (1 a) is fixed to the housing (50), the valve core (10) covers the peripheral opening (55), and the outer peripheral portion of the valve core (10) is in contact with the outer surface (52 a) of the housing (50) to block the flow of gas through the peripheral opening (55). In addition, ventilation is performed between the internal space (51) and the external space (52) by the ventilation film (30). When the pressure difference obtained by subtracting the pressure of the outer space (52) of the housing (50) from the pressure of the inner space (51) of the housing (50) is equal to or greater than a predetermined value, the valve core (10) elastically deforms and separates from the outer surface (52 a), and the pressure of the inner space (51) is released.

Description

Venting member

Technical Field

The present invention relates to a ventilation member.

Background

Conventionally, a valve called an umbrella valve is known.

For example, patent document 1 describes a rubber umbrella valve constituting a check valve device. The umbrella valve is used for an air pump. In the air pump, an umbrella valve is attached so as to block a plurality of flow passage holes formed in a partition wall in the housing. Thus, a check valve device is constituted.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2006-266414

Disclosure of Invention

Problems to be solved by the invention

The umbrella valve described in patent document 1 is used to construct a check valve device in an air pump. According to the technique described in patent document 1, ventilation cannot be generated when the umbrella valve is closed.

In view of the above, the present invention provides a ventilation member with a pressure release valve that can ventilate an internal space and an external space of a housing even in a state where a valve body portion is closed.

Means for solving the problems

The present invention provides a venting member with a pressure relief valve comprising:

a valve core part which comprises an elastomer and is formed into an umbrella cloth shape;

a shaft portion extending cylindrically in a normal direction of the valve body portion and supporting the valve body portion;

a ventilation passage penetrating at least one of the shaft portion and the valve core portion in a normal direction of the valve core portion; and

A ventilation film which blocks the ventilation passage so as to be capable of ventilation and which is capable of passing a gas in a thickness direction,

the ventilation member is used by being fixed to a housing having an opening for communicating an inner space with an outer space,

the housing has an opening for a shaft portion having an inner diameter into which the shaft portion can be inserted, and a peripheral opening located at a periphery of the opening for the shaft portion,

in a fixed state in which the ventilation member is fixed to the housing by inserting the shaft portion into the shaft portion opening, the valve body portion covers the peripheral opening, and an outer peripheral portion of the valve body portion contacts an outer surface of the housing to block a flow of gas passing through the peripheral opening, ventilation is performed between the inner space and the outer space through the ventilation film,

in the fixed state, when a pressure difference obtained by subtracting the pressure of the outer space of the housing from the pressure of the inner space of the housing is equal to or greater than a predetermined value, the valve body portion is elastically deformed to separate from the outer surface, and the pressure of the inner space is released.

In addition, the present invention provides a vent member with a pressure relief valve comprising:

an annular valve body part which comprises an elastic body, is umbrella-cloth-shaped and is provided with a through hole at the center in a plan view;

a cylindrical holding portion including an elastic body and having a ventilation passage penetrating in an axial direction;

the housing has a protruding opening formed by an edge of a protruding portion that protrudes cylindrically toward an outer space side of the housing and has an outer diameter insertable into the through hole and the ventilation passage, and a peripheral opening located at a periphery of the protruding opening,

after the edge of the protruding portion is inserted into the through hole, in a fixed state in which the edge of the protruding portion is inserted into the ventilation passage to fix the ventilation member to the housing, the valve body portion covers the peripheral opening, and an outer peripheral portion of the valve body portion contacts an outer surface of the housing to block a flow of gas passing through the peripheral opening, ventilation is performed between the internal space and the external space through the ventilation film,

Furthermore, the present invention provides a vent member with a pressure relief valve, comprising:

a shaft portion including an elastic body extending cylindrically in a normal direction of the valve body portion and supporting the valve body portion;

an air passage penetrating the shaft portion in a normal direction of the valve core portion; and

the housing has a protruding opening formed by an edge of a protruding portion that protrudes cylindrically toward an outer space side of the housing and has an outer diameter insertable into the ventilation passage, and a peripheral opening located at a periphery of the protruding opening,

in a fixed state in which the vent member is fixed to the housing by inserting the edge of the protruding portion into the vent passage, the valve body portion covers the peripheral opening, and the outer peripheral portion of the valve body portion contacts the outer surface of the housing to block the flow of gas passing through the peripheral opening, and the vent film vents between the inner space and the outer space,

Effects of the invention

The ventilation member can ventilate the internal space and the external space of the housing even in a state where the valve body portion is closed.

Drawings

Fig. 1A is a perspective view showing an example of a ventilation member according to the present invention.

Fig. 1B is a top view of the vent member shown in fig. 1A.

Fig. 1C is a cross-sectional view of the venting member along the line IC-IC of fig. 1B.

Fig. 2A is a cross-sectional view showing a state in which a valve body portion of a vent member attached to a housing is closed.

Fig. 2B is a cross-sectional view showing a state in which a valve body portion of a vent member attached to a housing is opened.

Fig. 3A is a perspective view showing another example of the ventilation member of the present invention.

Fig. 3B is a top view of the vent member shown in fig. 3A.

Fig. 3C is a cross-sectional view of the venting member taken along line IIIC-IIIC of fig. 3B.

Fig. 4A is a cross-sectional view showing a state in which a valve body portion of a vent member attached to a housing is closed.

Fig. 4B is a cross-sectional view showing a state in which a valve body portion of a vent member attached to a housing is opened.

Fig. 5A is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 5B is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 6 is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 7A is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 7B is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 7C is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 7D is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 8 is a cross-sectional view showing still another example of the ventilation member of the present invention.

Fig. 9 is a cross-sectional view showing still another example of the ventilation member of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description is an example of the present invention, and the present invention is not limited to the following embodiments.

As shown in fig. 1A, 1B, and 1C, the ventilation member 1A includes a valve core 10, a shaft 20, a ventilation passage 15, and a ventilation membrane 30. The ventilation member 1a is a ventilation member with a pressure release valve. The valve core 10 includes an elastic body and is formed in an umbrella cloth shape. The umbrella cloth shape means a shape like an umbrella cloth in an umbrella in a unfolded state. In fig. 1A, a two-dot chain line a is an axis line of the valve body 10. The shaft portion 20 extends in a cylindrical or columnar shape along the normal direction of the valve core 10. The normal direction of the valve core 10 means a direction perpendicular to the curved surface or plane of the valve core 10. The normal direction of the valve core portion 10 coincides with, for example, the direction in which the axis of the valve core portion 10 extends. The shaft portion 20 supports the valve core 10. The ventilation passage 15 penetrates at least one of the valve core 10 and the shaft 20 in the normal direction of the valve core 10. As shown in fig. 1C, the ventilation passage 15 penetrates the shaft 20, for example. The ventilation membrane 30 blocks the ventilation channel 15 so as to be capable of ventilation. The gas can pass through the vent film 30 in the thickness direction of the vent film 30.

As shown in fig. 2A and 2B, the ventilation member 1a is fixed to the housing 50 for use. The housing 50 has an opening that communicates the inner space 51 with the outer space 52. As such openings, the housing 50 has a shaft portion opening 53 and a peripheral opening 55. The shaft opening 53 has an inner diameter into which the shaft 20 can be inserted. The peripheral opening 55 is located at the periphery of the shaft portion opening 53.

As shown in fig. 2A and 2B, the ventilation member 1a is fixed to the housing 50 by inserting the shaft portion 20 into the shaft portion opening 53. In this way, in a state where the ventilation member 1a is fixed to the housing 50 (hereinafter referred to as "fixed state a"), for example, as shown in fig. 2A, the valve body portion 10 covers the peripheral opening 55, and the outer peripheral portion of the valve body portion 10 contacts the outer surface 52A of the housing 50 to block the flow of gas through the peripheral opening 55. Further, ventilation is performed between the inner space 51 and the outer space 52 by the ventilation film 30. On the other hand, as shown in fig. 2B, in the fixed state a, when the pressure difference obtained by subtracting the pressure in the outer space 52 of the housing 50 from the pressure in the inner space 51 of the housing 50 is equal to or greater than the predetermined value, the valve body 10 is elastically deformed to separate from the outer surface 52a, and the pressure in the inner space 51 is released. In other words, the ventilation member 1a satisfies the following conditions (i) and (ii) in the fixed state a, for example.

(i) When the difference obtained by subtracting the pressure of the outer space 52 of the housing 50 from the pressure of the inner space 51 of the housing 50 is smaller than the predetermined value, the valve body 10 contacts the outer surface 52a of the housing 50 to close so as to cover the peripheral opening 55, and ventilation is performed between the inner space 51 and the outer space 52 via the ventilation film 30.

(ii) When the difference obtained by subtracting the pressure of the outer space 52 of the housing 50 from the pressure of the inner space 51 of the housing 50 is equal to or greater than a predetermined value, the valve body 10 is elastically deformed to separate from the outer surface 52a, and the pressure of the inner space 51 is released.

According to the ventilation member 1a, when the valve body 10 is closed in the fixed state a, ventilation is performed between the inner space 51 and the outer space 52 through the ventilation passage 15 and the ventilation film 30. The ventilation film 30 can prevent foreign matter from entering the case 50. When the pressure in the case 50 increases sharply, and the difference obtained by subtracting the pressure in the outer space 52 of the case 50 from the pressure in the inner space 51 of the case 50 becomes equal to or greater than a predetermined value, the valve body 10 opens, and the pressure in the inner space 51 is released. This can prevent breakage of the ventilation film 30. Since the ventilation member 1a has a simple structure, the ventilation member 1a is manufactured at low cost.

The valve core 10 has, for example, an opposing surface 11 that faces the outer surface 52a of the housing 50 in the fixed state a. As shown in fig. 2A, when the spool portion 10 is closed, a part of the opposing face 11 is in contact with the outer surface 52A of the housing 50. The opposite face 11 extends in connection with the side face of the shaft portion 20. When the valve body 10 is closed, a closed space communicating with the internal space 51 of the housing 50 is formed outside the housing 50 by the facing surface 11 and the side surface of the shaft 20. The shaft portion 20 extends in the normal direction of the valve body portion 10 in the space surrounded by the opposing surface 11. Thus, the shaft portion 20 extends from the connection portion with the valve body portion 10 toward the housing, and the ventilation member 1a is easily fixed to the housing 50 by the shaft portion 20. In addition, the ventilation member 1a has a simple structure.

The shaft portion 20 has, for example, a locking portion 22. The locking portion 22 is locked to the inner surface 51a of the housing 50 in the fixed state a. Thereby, the ventilation member 1a can be fixed to the housing 50. The locking portion 22 prevents the ventilation member 1a from moving away from the housing 50. For example, the housing 50 has a mounting hole for mounting the ventilation member 1a, and the ventilation member 1a is fixed to the housing 50 by inserting the shaft portion 20 into the mounting hole.

As shown in fig. 1C, the ventilation path 15 has, for example, a first opening 15a. The first opening 15a is surrounded by the non-opposing face 12. The non-opposing surface 12 is a surface of at least one of the valve core 10 and the shaft 20 that does not face the outer surface 52a of the housing 50 when the ventilation member 1a is fixed to the housing 50. The ventilation film 30 is attached to the non-opposing surface 12 so as to cover the first opening 15a, for example. In this case, even if foreign matter such as dust or water comes into contact with the ventilation film 30, the foreign matter is less likely to remain in the ventilation passage 15. Therefore, the ventilation between the inner space 51 and the outer space 52 is easily and satisfactorily maintained.

In the ventilation member 1a, the valve body portion 10 and the shaft portion 20 are integrally formed, for example. For example, the valve core 10 and the shaft portion 20 may be manufactured by integral molding. This facilitates improvement in productivity in manufacturing the ventilation member 1a. In addition, the manufacturing cost of the ventilation member 1a is easily reduced.

The ventilation member 1a may be formed by assembling a member constituting the valve core 10 and a member constituting the shaft portion 20. In this case, the options of the material and the structure of each of the valve body portion 10 and the shaft portion 20 are likely to become various.

The elastomer contained in the valve core 10 is not limited to a specific elastomer. The elastomer contained in the valve core 10 is, for example, an elastomer such as natural rubber, synthetic rubber, or thermoplastic elastomer. In this case, examples of the synthetic rubber include Isoprene Rubber (IR), butadiene Rubber (BR), chloroprene Rubber (CR), butyl rubber (IIR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), ethylene-propylene rubber (EPM, EPDM), acrylate rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), silicone rubber (VMQ, FVMQ), urethane rubber (AU, EU), and fluororubber (FKM, FEPM).

The ventilation film 30 is not limited to a specific ventilation film as long as it has desired ventilation. The ventilation film 30 may be a single-layer film or a multilayer film. In the case where the ventilation film 30 is a multilayer film, each layer may be one selected from the group consisting of a porous film, a nonwoven fabric, a woven fabric, and a mesh. The ventilation film 30 may include a porous film and a nonwoven fabric, may include at least one of a woven fabric and a mesh, and a porous film, and may include a plurality of nonwoven fabrics. The ventilation film 30 is typically made of an organic polymer material (resin). The material of the porous film is, for example, a fluororesin. As the fluororesin, for example, polytetrafluoroethylene (PTFE), polytrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, or tetrafluoroethylene-ethylene copolymer can be used. Examples of the material of the nonwoven fabric, the woven fabric and the web include polyesters such as polyethylene terephthalate, polyolefins such as polyethylene and polypropylene, nylon, aramid or ethylene-vinyl acetate copolymer.

The gas permeable membrane 30 comprises, for example, an expanded PTFE porous membrane. In this case, the expanded PTFE porous membrane may be laminated on a breathable support material such as a nonwoven fabric.

The ventilation film 30 may be lyophobic as needed. The lyophobic treatment is performed, for example, by forming a lyophobic film containing a fluorine-based surface modifier having a perfluoroalkyl group on the ventilation film 30. The liquid repellent coating film may be formed by, for example, air spraying, electrostatic spraying, dip coating, spin coating, roll coating, curtain coating, or dipping, and the resin porous film may be coated with a solution or dispersion of a fluorine-based surface modifier having a perfluoroalkyl group. In addition, a liquid repellent coating film may be formed by an electrodeposition coating method or a plasma polymerization method.

The gas-permeable membrane 30 is bonded to at least one of the valve core 10 and the shaft 20, for example. The ventilation film 30 may be welded to at least one of the valve body 10 and the shaft 20. The ventilation film 30 may be attached to at least one of the valve body 10 and the shaft 20 by double-sided tape.

The ventilation member 1a may be modified from various viewpoints. For example, the ventilation member 1a may be modified as in the ventilation member 1B shown in fig. 3A to 3C, the ventilation member 1C shown in fig. 5A, the ventilation member 1D shown in fig. 5B, the ventilation member 1e shown in fig. 6, and the ventilation members 1f to 1i shown in fig. 7A to 7D. The ventilation members 1b to 1i are configured in the same manner as the ventilation member 1a, except for the portions specifically described. The same reference numerals are given to the same or corresponding components of the ventilation members 1b to 1i as those of the ventilation member 1a, and detailed description thereof will be omitted. The description of the ventilation member 1a applies to each of the ventilation members 1b to 1i as long as there is no technical contradiction.

As shown in fig. 3C, in the ventilation member 1b, the ventilation passage 15 penetrates the valve core 10. The ventilation member 1b has, for example, a plurality (4 in the drawing) of ventilation channels 15. As shown in fig. 3B, the plurality of ventilation channels 15 are arranged at equal angles around the axis a of the valve core 10, for example. In this way, when the ventilation passage 15 penetrates the valve core 10, a plurality of ventilation passages 15 are easily formed in the ventilation member 1 b.

For example, the ventilation member 1b has a step constituting the non-opposing surface 12 in the ventilation passage 15. The gas-permeable membrane 30 is mounted, for example, on the non-opposing face 12 in the step.

As shown in fig. 4A and 4B, the ventilation member 1B is opened and closed in the same manner as the ventilation member 1a, based on the magnitude of the difference obtained by subtracting the pressure in the outer space 52 of the housing 50 from the pressure in the inner space 51 of the housing 50.

As shown in fig. 5A, in the ventilation member 1c, the ventilation film 30 is disposed inside the ventilation passage 15, for example. In this case, when the ventilation member 1c is fixed to the housing 50, the ventilation film 30 is less likely to be contacted by the operator.

As shown in fig. 5B, in the ventilation member 1d, the ventilation film 30 is mounted so as to cover the second opening 15B. The second opening 15b is an opening of the ventilation passage 15 formed at a position farther from the non-opposing surface 12 than the first opening 15a in the normal direction of the valve body portion 10. In this case, the vent membrane 30 is not easily exposed to the outside space 52 of the housing 50.

As shown in fig. 6, in the ventilation member 1e, the ventilation passage 15 has a first opening 15a and a second opening 15b. The first opening 15a is surrounded by the non-opposing surface 12 that does not face the outer surface 52a of the housing 50 at least one of the valve core 10 and the shaft portion 20 when the ventilation member 1e is fixed to the housing 50. The second opening 15b is formed at a position farther from the non-opposing surface 12 than the first opening 15a in the normal direction of the spool portion 10. In the ventilation member 1e, the opening area of the first opening 15a is larger than the opening area of the second opening 15b. Thus, the ventilation amount of ventilation using the ventilation film 30 is liable to be increased.

In the ventilation member 1e, the ventilation film 30 is attached to the non-opposing surface 12 so as to cover the first opening 15a, for example.

In the ventilation member 1e, the valve body portion 10 has an opposing surface 11 that faces the outer surface 52a of the housing 50 when the ventilation member 1e is fixed to the housing 50. The shaft portion 20 has, for example, a pressing portion 40. When the non-opposing surface 12 is pressed against the opposing surface 11 in a state where the ventilation member 1e is fixed to the housing 50, the pressing portion 40 can be in contact with the housing 50. For example, it is conceivable to manufacture the ventilation member 1e by inserting a member including the ventilation member 1e of the valve core portion 10 and the shaft portion 20 into the mounting hole of the housing 50, and then pressing the ventilation film 30 against the member. In this case, in the pressure bonding of the vent film 30, the pressing portion 40 contacts the case 50 to restrict the movement of the member of the vent member 1e, and the vent film 30 can be appropriately pressure bonded. This facilitates improvement in productivity in manufacturing the ventilation member 1e.

As shown in fig. 7A, the ventilation member 1f further includes, for example, a flange 24. When the ventilation member 1f is viewed in plan along the normal direction of the valve body 10 toward the outer surface 52a of the housing 50, the flange 24 covers the valve body 10 around the shaft 20 and perpendicularly intersects the shaft 20. The ventilation passage 15 penetrates the flange 24 together with the shaft portion 20.

The ventilation member 1f is formed by assembling the valve core 10 and the shaft portion 20. In other words, it is formed by assembling the components constituting the valve core 10 and the components constituting the shaft portion 20. Thus, the choice of materials and construction of each of the valve core 10 and the shaft 20 is easily diversified.

In the ventilation member 1f, the shaft portion 20 and the flange 24 are integrally formed, for example. Accordingly, the ventilation member 1f is formed by assembling the valve core 10 and the member having the shaft portion 20 and the flange 24, for example. In addition, the shaft portion 20 and the flange 24 may be formed of different components, and these components may be assembled.

As shown in fig. 7A, the valve body portion 10 has a flat surface 10p that contacts the outer surface 52a of the housing 50 around the shaft portion 20 in the fixed state a. The flange 24 clamps the plane 10p of the valve core 10 together with the outer surface 52a of the housing 50 in the fixed state a. Thus, the valve core 10 is firmly fixed by the flange 24 and the outer surface 52 a.

In the ventilation member 1f, the valve body portion 10 has, for example, an annular pleat 10m. In the fixed state a, the pleat 10m is located, for example, directly above the peripheral opening 55. According to such a structure, it is easy to reduce the risk that the outer peripheral portion of the valve core 10 accidentally separates from the outer surface 52a of the housing 50 in the fixed state a, causing intrusion of foreign matter from the peripheral opening 55.

The ventilation member 1f further includes, for example, a cover 26. The cover 26 covers the ventilation film 30, and forms a space 25 communicating with the outside of the ventilation member 1f with the ventilation film 30. The cover 26 protects the ventilation film 30. In addition, by passing the gas through the ventilation passage 15 and the space 25, ventilation is performed between the inner space 51 and the outer space 52.

As shown in fig. 7A, the shaft portion 20 has a plurality of leg portions 20g, for example. The plurality of leg portions 20g are arranged to be separated from each other around the central axis of the shaft portion 20 by slits extending from the tip end of the shaft portion 20 along the central axis of the shaft portion 20. The plurality of leg portions 20g are formed with locking portions 22 at their distal ends. The locking portion 22 protrudes outward in a direction perpendicular to the central axis of the shaft portion 20. According to this configuration, when the tip end portion of the shaft portion 20 contacts the edge 2 of the shaft portion opening 53 during attachment of the ventilation member 1f including insertion of the shaft portion 20 into the shaft portion opening 53 to the housing 50, the leg portion 20g is elastically deformed inward. After that, when the locking portion 22 passes through the shaft portion opening 53, the deformation of the leg portion 20g is eliminated, and the locking portion 22 contacts, for example, the inner surface 51a of the housing 50. Thus, the locking portion 22 is engaged with the housing 50 by the snap fit, and the ventilation member 1f is attached to the housing 50.

As shown in fig. 7A, the vent membrane 30 is bonded to the flange 24, for example. The ventilation film 30 may be welded to the flange 24, or may be attached to the flange 24 by a double-sided tape.

The ventilation member 1g shown in fig. 7B, the ventilation member 1h shown in fig. 7C, and the ventilation member 1i shown in fig. 7D are each configured in the same manner as the ventilation member 1f except for the portions specifically described. The same reference numerals are given to the same or corresponding components of the ventilation members 1g to 1i as those of the ventilation member 1f, and detailed description thereof will be omitted. The description of the ventilation member 1f is applicable to each of the ventilation members 1g to 1i as long as there is no technical contradiction.

As shown in fig. 7B, in the ventilation member 1g, the valve body 10 is formed in an annular sheet shape. In the fixed state a, the ventilation member 1g extends along the outer surface 52a of the housing 50 on one principal surface of the valve core 10. Typically, one major face of the valve core 10 is in contact with the outer surface 52a of the housing 50. With such a configuration, the structure of the valve core 10 can be simplified, and breakage of the gas permeable membrane 30 due to rapid pressure rise in the housing 50 can be prevented.

As shown in fig. 7C, in the ventilation member 1h, the valve body portion 10 is an annular sheet. The valve core 10 has a protrusion 10t. The protrusion 10t is accommodated in the peripheral opening 55 in the fixed state a. According to such a structure, the risk of foreign matter entering the internal space 51 of the housing 50 through the peripheral opening 55 can be further reduced.

As shown in fig. 7D, in the ventilation member 1i, the valve body portion 10 has a covering portion 10c that covers the outer peripheral surface of the shaft portion 20. The cover portion 10c covers the locking portion 22, for example. According to such a configuration, the outer peripheral surface of the shaft portion 20 can be protected by the valve core portion 10.

The ventilation member 1j shown in fig. 8 can also be provided. The ventilation member 1j can be configured in the same manner as the ventilation member 1a, except for the portions described specifically. The same reference numerals are given to the same or corresponding components of the ventilation member 1j as those of the ventilation member 1a, and detailed description thereof will be omitted. The description of the ventilation member 1a is applicable to the ventilation element 1j as long as there is no technical contradiction.

The ventilation member 1j is a ventilation member with a pressure release valve. The ventilation member 1j includes an annular valve body portion 10, a cylindrical holding portion 23, and a ventilation membrane 30. The valve core 10 includes an elastic body, has an umbrella cloth shape, and has a through hole 10h in the center in plan view. The holding portion 23 includes an elastic body and has a ventilation passage 23h penetrating in the axial direction. The ventilation film 30 is a film that blocks the ventilation passage 23h so as to be able to ventilate and is able to pass gas in the thickness direction.

The ventilation member 1j is fixed to the case 50 for use, for example. The housing 50 has an opening that communicates the inner space 51 with the outer space 52. As such openings, the housing 50 has a protruding opening 53t and a peripheral opening 55. The protruding opening 53t is formed by the edge of the protruding portion 50 p. The protruding portion 50p protrudes cylindrically toward the outer space 52 side of the housing 50, and has an outer diameter that can be inserted into the through hole 10h and the ventilation passage 23h.

As shown in fig. 8, after the edge of the protruding portion 50p is inserted into the through hole 10h, the edge of the protruding portion 50p is inserted into the ventilation passage 23h, and the ventilation member 1j is fixed to the case 50. In this way, in a state where the ventilation member 1j is fixed to the housing 50 (hereinafter referred to as "fixed state B"), for example, as shown in fig. 8, the valve core 10 covers the peripheral opening 55, and the outer peripheral portion of the valve core 10 contacts the outer surface 52a of the housing 50 to block the flow of gas through the peripheral opening 55. Further, ventilation is performed between the inner space 51 and the outer space 52 by the ventilation film 30. On the other hand, in the fixed state B, when the pressure difference obtained by subtracting the pressure in the outer space 52 of the housing 50 from the pressure in the inner space 51 of the housing 50 is equal to or greater than the predetermined value, the valve body 10 elastically deforms and separates from the outer surface 52a, and the pressure in the inner space 51 is released. This can prevent breakage of the ventilation film 30.

Typically, in the fixed state B, the inner peripheral surface of the holding portion 23 is in contact with the outer peripheral surface of the protruding portion 50 p. In the fixed state B, the edge of the through hole 10h is in contact with the outer peripheral surface of the protruding portion 50 p.

The elastic body included in the holding portion 23 is not limited to a specific elastic body. The elastic body included in the holding portion 23 is exemplified as the elastic body included in the valve core 10.

As shown in fig. 8, the ventilation film 30 is bonded to the holding portion 23, for example. The ventilation film 30 may be welded to the holding portion 23, or may be attached to the holding portion 23 by a double-sided tape.

The ventilation member 1j is formed by assembling the valve core 10 and the holding portion 23, for example. In other words, the ventilation member 1j is formed by assembling the members constituting the valve core 10 and the members constituting the holding portion 23. The options of the material and the construction of each of the valve core 10 and the holding portion 23 easily become diverse.

As shown in fig. 8, the ventilation member 1j further includes a bottomed tubular cover 27. The cover 27 has an inner diameter into which the holding portion 23 can be inserted. The cover 27 covers the ventilation film 30 when the holding portion 23 is inserted into the cover 27, and forms a space 29a communicating with the outside of the ventilation member 1j with the ventilation film 30. With this structure, the ventilation film 30 can be protected by the cover 27. Further, by passing the gas through the space 29a, ventilation is performed between the inner space 51 and the outer space 52.

When the holding portion 23 is inserted into the cover 27, a part of the inner surface of the side wall of the cover 27 is in contact with the outer peripheral surface of the holding portion 23. On the other hand, the other portion of the inner surface of the side wall of the cover 27 is separated from the outer peripheral surface of the holding portion 23. Thereby, the holding portion 23 is fixed to the inside of the cover 27, and the space 29a communicates with the outside of the ventilation member 1j.

An opening is formed in an end portion of the cover 27 on the opposite side of the bottom portion. At least a portion of the edge of the opening of the cover 27 protrudes toward the axis of the cover 27. Thereby, at least a part of the edge of the opening of the cover 27 is engaged with the outer peripheral surface of the holding portion 23, for example, when the holding portion 23 is inserted. Therefore, the cover 27 can be attached to the holding portion 23 in a desired state.

The ventilation member 1k shown in fig. 9 can also be provided. The ventilation member 1k can be configured in the same manner as the ventilation member 1a, except for the portions described specifically. The same reference numerals are given to the same or corresponding components of the ventilation member 1k as those of the ventilation member 1a, and detailed description thereof will be omitted. The description of the ventilation member 1a is applicable to the ventilation element 1k as long as there is no technical contradiction.

The ventilation member 1k is a ventilation member with a pressure release valve. The ventilation member 1k includes a valve body portion 10 formed in an umbrella cloth shape, a shaft portion 20, a ventilation passage 15, and a ventilation film 30. The valve core 10 comprises an elastomer. The shaft portion 20 includes an elastic body and extends cylindrically in the normal direction of the valve body portion 10. Further, the shaft portion 20 supports the valve core 10. The ventilation passage 15 penetrates the shaft portion 20 in the normal direction of the valve body portion 10. The ventilation film 30 is a film that blocks the ventilation passage 15 so as to be able to ventilate and is able to pass gas in the thickness direction.

The ventilation member 1k is fixed to the housing 50 for use, for example. The housing 50 has an opening that communicates the inner space 51 with the outer space 52. As such openings, the housing 50 has a protruding opening 53t and a peripheral opening 55. The protruding opening 53t is formed by the edge of the protruding portion 50 p. The protruding portion 50p protrudes cylindrically toward the outer space 52 side of the housing 50, and has an outer diameter that can be inserted into the ventilation passage 15.

As shown in fig. 9, the edge of the protruding portion 50p is inserted into the ventilation passage 15 to fix the ventilation member 1k to the housing 50. In this way, in a state where the ventilation member 1k is fixed to the housing 50 (hereinafter referred to as "fixed state C"), for example, as shown in fig. 9, the valve body portion 10 covers the peripheral opening 55, and the outer peripheral portion of the valve body portion 10 contacts the outer surface 52a of the housing 50 to block the flow of gas through the peripheral opening 55. Further, ventilation is performed between the inner space 51 and the outer space 52 by the ventilation film 30. On the other hand, in the fixed state C, when the pressure difference obtained by subtracting the pressure in the outer space 52 of the housing 50 from the pressure in the inner space 51 of the housing 50 is equal to or greater than the predetermined value, the valve body 10 elastically deforms and separates from the outer surface 52a, and the pressure in the inner space 51 is released. This can prevent breakage of the ventilation film 30.

Typically, in the fixed state C, the inner peripheral surface of the shaft portion 20 contacts the outer peripheral surface of the protruding portion 50 p.

The elastic body included in the shaft portion 20 is not limited to a specific elastic body. The elastic body included in the shaft portion 20 includes an elastic body exemplified as an elastic body included in the valve core portion 10.

As shown in fig. 9, the ventilation film 30 is bonded to the shaft portion 20, for example. The ventilation film 30 may be welded to the shaft 20, or may be attached to the shaft 20 by a double-sided tape.

In the ventilation member 1k, the valve body portion 10 and the shaft portion 20 are integrally formed. For example, the valve core 10 and the shaft portion 20 may be manufactured by integral molding. This facilitates improvement in productivity in manufacturing the ventilation member 1k. In addition, the manufacturing cost of the ventilation member 1k is easily reduced. The ventilation member 1a may be formed by assembling a member constituting the valve core 10 and a member constituting the shaft portion 20. In this case, the options of the material and the structure of each of the valve body portion 10 and the shaft portion 20 are likely to become various.

As shown in fig. 9, the ventilation member 1k further includes a bottomed tubular cover 27. The cover 27 has an inner diameter into which the shaft portion 20 can be inserted. The cover 27 covers the ventilation film 30 when the shaft portion 20 is inserted into the cover 27, and forms a space 29b with the ventilation film 30, which communicates with the outside of the ventilation member 1k. With this structure, the ventilation film 30 can be protected by the cover 27. Further, by passing the gas through the space 29b, ventilation is performed between the inner space 51 and the outer space 52.

When the shaft portion 20 is inserted into the cover 27, a part of the inner surface of the side wall of the cover 27 is in contact with the outer peripheral surface of the shaft portion 20. On the other hand, the other portion of the inner surface of the side wall of the cover 27 is separated from the outer peripheral surface of the shaft portion 20. Thereby, the shaft portion 20 is fixed to the inside of the cover 27, and the space 29b communicates with the outside of the ventilation member 1k.

Claims

1. A venting member with a pressure relief valve, comprising:

in the fixed state, when a pressure difference obtained by subtracting the pressure of the outer space of the housing from the pressure of the inner space of the housing is equal to or greater than a predetermined value, the valve body portion is elastically deformed to separate from the outer surface, the pressure of the inner space is released,

the valve body portion and the shaft portion are integrally formed,

alternatively, the ventilation member may be fixed to the housing so that the shaft portion opening and the peripheral opening are formed in the same plane, and the valve body portion may have a constant thickness between both ends of a flange covering the valve body portion around the shaft portion in a direction perpendicular to the shaft portion.

2. The vent member of claim 1, wherein,

the vent member further includes a flange that covers the valve body portion around the shaft portion and perpendicularly intersects the shaft portion when the vent member is viewed in plan view along a normal direction of the valve body portion toward an outer surface of the housing,

the ventilation passage penetrates the flange together with the shaft portion.

3. The ventilation member according to claim 1 or 2, wherein,

the vent member is formed by assembling the valve core portion and the shaft portion, or by assembling the valve body portion and a member having the shaft portion and the flange.

4. The vent member of claim 2, wherein,

the valve core portion has a flat surface in contact with the outer surface of the housing around the shaft portion in the fixed state,

the flange in the secured state clamps the planar surface of the valve core together with the outer surface of the housing.

5. The ventilation member according to claim 1 or 2, wherein,

the shaft portion has a locking portion that is locked to an inner surface of the housing in the fixed state.

6. The ventilation member according to claim 1 or 2, wherein,

the ventilation member further includes a cover that covers the ventilation film and forms a space with the ventilation film that communicates with an outside of the ventilation member.

7. A venting member with a pressure relief valve, comprising:

8. The vent member of claim 7, wherein,

the ventilation member further includes a bottomed cylindrical cover having an inner diameter into which the holding portion can be inserted,

the cover covers the ventilation film when the holding portion is inserted, and forms a space with the ventilation film, which communicates with the outside of the ventilation member.

9. The ventilation member according to claim 7 or 8, wherein,

the ventilation member is formed by assembling the valve body portion and the holding portion.

10. A venting member with a pressure relief valve, comprising:

11. The vent member of claim 10, wherein,

the ventilation member further includes a bottomed cylindrical cover having an inner diameter into which the shaft portion can be inserted,

the cover covers the ventilation film when the shaft is inserted, and forms a space with the ventilation film, which communicates with the outside of the ventilation member.

12. The ventilation member according to claim 10 or 11, wherein,

the valve body portion and the shaft portion are integrally formed.